Hotel JL no76 was great for a 2night stay with family and we would return.
We stayed in a family room that had bunk beds in a small alcove which meant a good space and the children could go to sleep slightly earlier than us and not be disturbed. The room was in the basement so in the morning there was some noise / activity from outside with the cleaners getting ready. This did not disturb / impact us but you may want to take this into consideration.
Breakfast was very good, with a fairly small but good quality assortment of pastries, bread, granolas and hot elements such as bacon, eggs and sausages. I believe there was the option to order from a small menu also.
Reception staff were incredibly welcoming, giving a list of suggested (and personal favorite) restaurants etc and also offered to make any reservations we required.
Location was fab. A quiet street just off the museum plaza and tram stop. Easy walking distance to central Amsterdam and everything we needed to see. Rijks musem was a short walk away and highly recommended.
There were also some fab high end shops in the locality too. It was 20 minutes or so on the tram from the central train station.
Overall would highly recommend